game-engine : error totblock : 1. Memory Leak?
Blender uses a memory management system that keeps track of the number of memory allocations it has made. When blender finishes it reports the number of remaining memory allocations. A small number is of little concern but a large number indicates that memory is being allocated and not released, meaning a memory leak.

If you start blender from a terminal (or show the windows console) you will see a similar message as blender quits Error: Not freed memory blocks: xx while blenderplayer gives the more cryptic Error Totblock: xx

This is related to blenders source code and not likely from anything you have done in your game creation. If you do see large numbers it might be worth reporting or talking with a developer on irc to help find a cause.

Personally I think this should be disabled for normal user usage. Only blender developers would have any interest in this information.